Journal of Materials Science

, Volume 38, Issue 8, pp 1645–1651

Synthesis of nanocomposite thin films containing Ag-Au alloy colloids for wavelength tunability

Article

DOI: 10.1023/A:1023255105369

Cite this article as:
Suyal, G., Mennig, M. & Schmidt, H. Journal of Materials Science (2003) 38: 1645. doi:10.1023/A:1023255105369

Abstract

A chemical solution deposition route to synthesize silver-gold alloy colloids in thin films with diameters between 8–35 nm has been developed. Ag-Au alloy colloids were synthesized by the addition of silver ions to a polymer protected aqueous gold sol in presence of a seeding agent 'hydroxylamine hydrochloride,' followed by a heat-treatment under reducing atmosphere at temperatures ranging from 150–550°C. The resonance wavelength of Ag-Au alloy colloids exists between those of pure Ag (410 nm) and pure Au (525 nm) colloids, which can easily be controlled by selecting the molar ratio of Ag to Au. This allows the tunability of the absorption wavelength (hence the color) by using Ag-Au alloy colloids in thin films.

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  1. 1.Institüt für Neue MaterialienSaarbrückenGermany